After dotting concealer under your eyes, move on to any other problem areas you may have, such as around your nose, chin and mouth. You can also dot any small pimples or discoloration. Begin tapping the dots. If you rub them, for example, you could cause streaks that will make the concealer obvious. Simply tapping where you applied the concealer gently will help it to blend in. Make sure your fingers are clean when you do this. They are your best tool, but they won’t work if you stretch or pull your skin.